湖北荆当盆地何家湾地区三维地质地球物理模型研究

3D geophysical modelling in Hejiawan area of the Jingmen-Dangyang Basin,Hubei Province

荆当盆地位于湖北中部偏西,自20世纪中期以来,区域上先后进行过多次大范围的区域地质调查工作,发现了茶林子、小汉口、泥水洞、三宝山、铜家湾、花园冲等多处铜多金属矿点。然而在荆当盆地中部的何家湾地区,找矿工作一直未有进展,原因主要受限于研究区地表被第四系大范围覆盖,传统的地质调查方法很难开展。因此,2015年在研究区内又开展了1∶5万地质草测、1∶5万重力测量、1∶5万磁法测量等工作。通过研究获得的这些地质资料及重磁数据,结合收集到的其他区域地质资料及相关研究成果,建立了三维地质模型,为研究区今后的找矿工作提供新的思路。

Jingmen-Dangyang Basin is located in the middle-west of Hubei Province. Since the middle of 20 th century,the region has experienced a number of large-scale regional geological surveys. Many copper polymetallic ore occurrences were found,such as Chalinzi,Xiaohankou,Nishuidong,Sanbaoshan,Tongjiawan and Huayuanchong. However,in the Hejiawan area,prospecting has not seen progress. The main reason is that the surface of the study area is mainly covered by the Quaternary,which hinders traditional geological survey. In 2015,1 ∶50 000 geological sketch survey,1 ∶50 000 gravitational survey and 1 ∶50 000 magnetic survey were carried out. Based on these geological,gravitational and magnetic data,and other regional geological materials and research progress,the paper built a 3D model of the study area,which could provide inspiration for future prospecting in the study area.